Rotary brush



April 14, 1931. CORNELL 1,800,376

ROTARY BRUSH Filed Nov. 11, 1929 ZZZ-EG- .2

\\\ WWMWW A TTOFFNEY WITNESSES Patented 1 4, 1931 3 1311511 L. e. CORNELL, OEi MILWAUKEE, wrsoonsiir, Assmnon mo- BRUSH MANUFACTURING COMPALTY OF MILWAUKEE, WISCONSIN, A (I OIR-PGRIA'J.IONv

, or w rsconsm THE MILWAUKEE 30mm BRUSH application filed Noveniber. 11,1929. Serial No. 406,304. 7

The invention relates to rotary brushes.

An objectof the invention is to provide a, rotarybrush of simple but effective construction, permitting the use of a large number of bristles within a givens'pace for increasing the life of the brush. 7 I

Another objectof the invention is to provide. a'rotary brush including a plurality of -bristle-holdingrings which are. axially compressed in the assemblyof the brush to form a dense bristle Structure. i

A further object of the invention is to pro-' vide a rotary brush including a sheet metal hub structure which, ,isof relatively light weight and simple'c'onstruction and which w ll permit the brush to be assembled in balanced condition." v v i The invention further consists in theseveral features hereinafter set forth and more v particularly defined by the annexed claims;

In the accompanying drawings,

Fig. 1 is a side elevation of a rotary brush embodying the invention, parts being broken away and parts being shown in section;

Fig. 2 is a sectional view of the brush taken on the line 22 of Fig. 1;

r Fig. 8 is an expanded perspective view of the hub, and

Fig. 4 is a perspective view of an adapted for permitti the use of the brush on a smaller shaft V c p The hub structure of the brush includes a pair of complementary semi-cylindrical sheet if a cylindrical metal memberslO, which co-operate to form sleeve and which are provided at their adjacent edges with outstanding flanges ll disposed in abutting relation. A

- pair of complementary sheet metal members '12 surround the sleeve-forming members 10 and are provided with inturned flanges 13 at their adjacent ends, disposed in edgewise abutment with the mid-portions of the outer periphery of the sleeve-forming members 10,

' the outstanding'flanges 11 of the members 10 I 7 being disposed in edgewise abutment with the mid portions of the inner periphery of' the sheet metal members 12, as best seen in Fig. 3.

The sheet metal members 12 are each pro-Y I 'vided with shallowvchannel's 14 extending w 50 parallel to the axis of the hub to receive attaching'n'iembers therein, as hereinafter described, andthese channels are each arranged a substantially midway between the flanges 11 and 13.: The hub structure "also includes a pair of'end' clamping plates or disks 15, each of which is providedwith a central'shaft-receiving opening 16'and a plurality'ofspaced slots'17 adapted to (register with the ends of the channels '14 in the sheet metal h'ubmem bars 12- to' receive therethrough sheet metal attaching members 18; The attachingfmembers 18' include laterally extending end flan es 19 which serve to hold the end clampi-ng disks in abutment with the sheet metal members 10 and 12', as hereinafter described; A plurality of bristle-holding rings- 20' are placed in lateral abutment about-the hubmembers 12' and each ring 20 preferably is of a type in which radially extendingbristles 21 are held on a twisted pair of wires.

In assembling the brush one of the end disks i5 is set in a press with the assembled sheet metal hub members 10 and12 set'concentrically thereon and receiving in the channels 14 the. attaching members18, which pass through the slots 17in the disk and have" their flanges 19 abuttingonthe then lower face i of the disk. The bristle-supporting rings 20- are then slipped over the outer hub members passed over the upstanding'ends of the at-' t'aching'mem'bers 18. The brushassembly is then subjected to high pressure to squ'eeze the- 12 and the other end di'sk' 15 is bri'stle-hold ing rings 20 tightly together to lie within theywidth of the hub members 12,-

and the upper endsofflthe attaching members- 18 are then clinched over onto the upper "end disk 15 to retain the parts in assembled 'rela-l tion. During the pressing operation the bristle-holding rings QOItend to become flattened and press inwardly onjthehu-b'members,

12 to thereby compress both the .hub members 10 and 12, which are formed in complementary parts, as above describedj The sheet metal hub members 10 and 12 are sufficiently deformable to be urged inwardly during the pressing operation, which distributes the stresses arising during the pressing operation and facilitates the obtaining of a balanced condition of the brush. The bristle-holding rings 20 are now tightly held in place against shifting and a dense bristle structure is formed by the lateral compression of the bristle-holding rings 20, thereby insuring long service. The end plates or disks 15 are preferably provided with inturned prongs or tongues 22, which extend into the space occupied by the bristles.

v The coaxiallyarranged openings end plates or disks 15 are adapted to have ashaft fit therein, which is clamped tothe brush in the usual manner. When the brush is to be mounted on a smaller shaft a pair of adapters 23 are fitted into opposite sides of the hub, one of these adapters being shown in Fig. 4. Each adapter consists of a sheet metal plate, which is provided with an inturned annular flange 24 forming a shaft receiving opening therein, .aplurality of inturned flanges 25 adapted to fit Within the circular opening 16of the end plate, and a plurality of radially extending projections 26 adapted to engage the outer face of the end plate'15.

7 Before the brush is placed in service, the radially extending bristles 21 are trimmed at their outer ends to provide a circular pe-.

riphery. V r I V The invention provides a'rotary brush including a light but strong .hub structure on which the densely packed bristles and their holding members can be securely mounted without'the use of metal calking, such as lead, thereby permitting a balanced condi- 1. In a rotary brush, the combination of a hub including a plurality of complementary radially yielding members and a pair.

of clamping 'disksarranged at the opposite ends of the hub, a plurality of bristle-holding rings carried on said hub members in' laterally adjacent relation and including radiall -extendin bristles and means for re taining said clamping disks against said hub to" hold said bristle-ho-ldingrings on said hub in axially-compressed relation to provide a dense bristle structure.

2. In a rotary brush, the combination of a hub having channels extending therealong on its outer periphery in parallel relation to the axis a luralit of bristle-holdin rings a P y g mounted on said hub and including radially extending bristles, a pair of clamping plates disposed at opposite ends of said hub, and attaching members connecting said clamping plates for retaining saidbristle holding rings in axial compression, said attaching members it as at in said channels; p

3. Ina rotary brush, the combination of a having their intermediate portions disposed pair of complementary inner hub members,

a pair of complementary outer hub members surroundmg sa1d 1nnerhub. members and having their joints olfset from the joi'nts of said hub members to hold bristle-holding rings on the hub structure in axially-conipressed. relation to" provide adense bristle structure, the axial compression of said bristle-holding rings urging saidhub members inwardly into tightly assembled relation. 4. In a rotary brush, the combination of a pair of complementary inner hub members having outstanding flanges disposed in abutting relation, a pair of complementary outer hub members surrounding said inner hub members and having iinturned abutting flanges, said inturned flanges being adapted to abut at their end portions against said inner hub members and said outstanding flanges being adaptedto abut at their end portions against said outer hub members, a plurality of bristle-holding rings carried on said outer hub members and including radially extending bristles, and means for retaining said bristle-holding rings. on said hub in axially-compressed relation.

In testimony whereof I aflix my signature.

IRSIL L. G. CORNELL. 

